#include<stdio.h>
#define SUM 100000
int main()
{
    float amount,aver,total;
    int i;
    for(i = 1,total = 0;i <= 1000;i++)
    {
        printf("please enter amount:");
        scanf("%f",&amount);
        total = total + amount;
        if (total >= SUM)
        break;
    }
    aver = total/i;
    printf("num=%d\naver=%10.2f\n",i,aver);
    return 0;

}